Question about 2007 Chevrolet Cobalt Coupe
P0315 = Crankshaft Position System Variation Not Learned.
Sounds like the crank sensor might be shot... but I'm guessing you would also see the car misfiring or giving other symptoms if the crank sensor was bad. You could try clearing the codes and see if it returns if there are no symptoms.
Basically the ECU is not getting crankshaft pulse signal. It's probably running on emergency strategy and that could be why your getting some misfires.
Posted on Sep 06, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
The ability of the control modules to communicate through the serial data circuit
The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of Vehicle System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Have vehicle scanned for DTC'S . The power roof has a number of DTC'S that can be set ,could make diagnosing easier !
DTC B1010 DTC B1296 DTC B1307 DTC B1325 DTC B1335 DTC B1345 DTC B1395 DTC B316A DTC B3602 DTC B3669 DTC B366A DTC B366B DTC B366C DTC B366D DTC B366E DTC B3674 DTC B3675 DTC B367A DTC B367B DTC B367F DTC B3680 DTC B3683 DTC B3685
There are a number of sensors for your convertible top !
DTC B1010 08: System Sensors Data Mismatch signal invalid
DTC B1010 08 sets when the folding top control (FTC) module detects a switch is not in the proper state when compared to other switches. The conditions that cause DTC B1010 08 to set may also set other Folding Top DTCs. The position and direction of the folding top when the fault occurs will determine whether DTC B1010 08 will set or another Folding Top DTC will set. If any Folding Top DTCs between DTC B1296-DTC B3685 are set, diagnose those DTCs first. After diagnosing any other Folding Top DTCs, clear DTCs and operate the Folding Top to see if DTC B1010 08 resets before diagnosing it.
DTC B1296 01: Movable Roof Header Unlatched Sensor Circuit short to battery
DTC B1296 06: Movable Roof Header Unlatched Sensor Circuit short to ground or open
DTC B1296 58: Movable Roof Header Unlatched Sensor Circuit incorrect reaction after event
DTC B1296 59: Movable Roof Header Unlatched Sensor Circuit circuit/component protection time out
You best bet is to take your vehicle to a ASE certified repair shop or to a GM dealer .
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